S3Scanner vs mass-s3-bucket-tester: 2026 Comparison
S3Scanner is a free security scanning tool. mass-s3-bucket-tester is a free security scanning tool. Compare features, ratings, integrations, and community reviews side by side to find the best security scanning fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
DevOps teams and security engineers doing periodic S3 audits will find real value in S3Scanner's speed and specificity; it catches bucket policy misconfigurations and public access vectors that generic CSPM tools often miss in their first scan. The 3,022 GitHub stars reflect active maintenance and community trust from practitioners running it in production environments. Skip this if you need continuous monitoring and automated remediation across hundreds of buckets; S3Scanner is built for manual scans and one-off assessments, not real-time drift detection.
DevOps and cloud security engineers who need to audit S3 bucket configurations across multiple accounts will appreciate mass-s3-bucket-tester because it runs locally without API overhead or credential management complexity. The tool tests for the two highest-friction misconfigurations,public directory listing and anonymous uploads,which account for the majority of real S3 breaches in the wild. Skip this if you need continuous monitoring or remediation; it's a point-in-time scanner best suited to one-off audits or CI/CD pipeline checks, not ongoing compliance tracking.
